I would be interested to know exactly how you use a Raspberry Pi to stream music. I am not on any service and do not plan to be. I do watch YouTube music videos and play that through the computer speakers. My music would probably come from the PC and go to the DAC then to the stereo. Sources could be videos or online radio streaming. I run Linux which I believe is very DAC friendly.I have one of that second external DAC you showed ( They ship under a variety of brand names, mine is SIGNSTEC and appears to be the same DAC. ) and it is noticeably better than the built-in PC audio, which is not bad on it's own.
In my experience once you've spent about $40 or so dollars on an external DAC the improvements come more slowly as the $ cost escalates dramatically.
For the record I have three Raspberry Pi based streamers that I built with $10 USB C Phone Dongles. Those streamers beat the SIGNSTEC external DAC handily in terms of sound quality. Go figure.
Mark Gosdin